Poison Claude's Gray Market AI Model Access Exposed

A gray market for accessing Anthropic's AI models has emerged online, with services like Poison Claude and Ecomagent offering discounted access to users. Researchers discovered that Poison Claude is reselling access to Anthropic's premium AI models at a significant discount by exploiting cloud accounts that have been fraudulently registered and filled with free bonus credits.

The service, hosted on the domain poison-claude.bitsender.top, openly advertises 'unlimited' tokens through prompt-metered plans and bundled token packages. Customers are charged only 5 to 15 percent of Anthropic's official per-token rate, which helps both operators and customers avoid identity verification.

Okta Threat Intelligence discovered that Poison Claude has around 881 total users and 872 active users at the time of discovery. The service accepts payment exclusively in cryptocurrencies like Tether, USD Coin, Ethereum, Litecoin, and Bitcoin. Researchers traced a related endpoint to a Hostinger server in Mumbai before the exposure was patched.

A similar service, Ecomagent.in, offers discounted access to Opus and Sonnet models alongside GPT Codex 5.5 by exploiting Google Cloud's startup credit program. Anthropic has responded by introducing Persona-based identity verification requiring government ID and selfie checks for some new accounts.